The UPB can toggle between two video signals: the DSLR in Live View mode
and this tiny video camera. The tiny lens, which points out the front
of the CPU case, is very wide so you can take a peek at what's going on
outside the blind without turning on the
DSLR in Live View mode. This saves DSLR battery power and is also
useful when using longer focal lengths (so you don't have to pan the
camera around to see the what's going, potentially scaring off your
subject)